Merge branch 'tests' into 'master'

README_tests.md

Vagrantfile

handlers/borg.in

handlers/dup.in

handlers/rdiff.in

test/backupninja.bats

test/borg.bats

test/common.bash

test/dup.bats

test/mysql.bats

test/pgsql.bats

test/rdiff.bats

test/rsync.bats

test/samples/bntest_p8Cz8k.psql.gz

test/samples/bntest_p8Cz8k.sql.gz

test/samples/bntest_v11vJj.psql.gz

test/samples/bntest_v11vJj.sql.gz

test/sh.bats

test/sys.bats

test/tar.bats